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5205-63-0

The Diels-Alder adduct is a chemical compound resulting from the Diels-Alder reaction, a significant organic chemical reaction involving the cycloaddition of a conjugated diene and an alkene, typically an electron-deficient alkene. This reaction, named after its discoverers Otto Diels and Kurt Alder, is a key process in organic synthesis due to its ability to form six-membered rings with high selectivity and efficiency. The resulting adducts are often used as intermediates in the synthesis of various complex organic molecules, including pharmaceuticals, agrochemicals, and natural products. The reaction is characterized by its thermal and stereoselectivity, and it is a cornerstone in the field of organic chemistry, providing a powerful tool for constructing molecular complexity.

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  • 5205-63-0 Structure

  • Basic information

    1. Product Name: Diels-Alder adduct
    2. Synonyms: Diels-Alder adduct
    3. CAS NO:5205-63-0
    4. Molecular Formula:
    5. Molecular Weight: 269.341
    6. EINECS: N/A
    7. Product Categories: N/A
    8. Mol File: 5205-63-0.mol

  • Chemical Properties

    1. Melting Point: N/A
    2. Boiling Point: N/A
    3. Flash Point: N/A
    4. Appearance: N/A
    5. Density: N/A
    6. Refractive Index: N/A
    7. Storage Temp.: N/A
    8. Solubility: N/A
    9. CAS DataBase Reference: Diels-Alder adduct(CAS DataBase Reference)
    10. NIST Chemistry Reference: Diels-Alder adduct(5205-63-0)
    11. EPA Substance Registry System: Diels-Alder adduct(5205-63-0)

  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: N/A
    3. Safety Statements: N/A
    4. WGK Germany:
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 5205-63-0(Hazardous Substances Data)

5205-63-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5205-63-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,2,0 and 5 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 5205-63:
(6*5)+(5*2)+(4*0)+(3*5)+(2*6)+(1*3)=70
70 % 10 = 0
So 5205-63-0 is a valid CAS Registry Number.

5205-63-0Relevant articles and documents

MANUFACTURE OF VITAMIN B6

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Page/Page column 12-14, (2008/06/13)

A process for manufacturing a 3-unsubstituted, 3-monosubstituted or 3,3-disubstituted 9-acyloxy-1,5-dihydro-8--methylpyrido[3,4-e] [1,3]dioxepin (I) and optionally for manufacturing pyridoxine involves performing an addition reaction between a 4-methyl-5-alkoxy-oxazole (II) and a 2-unsubstituted, 2-monosubstituted or 2,2-disubstituted 4,7-dihydro-(1,3)-dioxepin (III) in the substantial absence of a solvent and a catalyst to give a product mixture consisting essentially of the appropriate Diels-Alder adduct (IV) in a major proportion and the appropriate 3--unsubstituted, 3-monosubstituted or 3,3-disubstituted 1,5-dihydro-8-methylpyrido[3,4-e] [1,3]dioxepin 9-ol (V) in a minor proportion, removal of a substantial proportion of the unreacted oxazole and dioxapin starting materials from the product mixture by distillation under reduced pressure, addition of a substantially anhydrous organic acid to said product mixture and rearrangement of the Diels-Alder adduct IV to further V in the presence of said substantially anhydrous organic acid with removal of the generated alkanol by distillation under reduced pressure, and acylation of the resultingly enriched quantity of V with an added carboxylic acid anhydride to produce the desired I, and optionally converting this so-manufactured acylation product I to pyridoxine by acid hydrolysis for achieving deprotection and deacylatiom. Pyridoxine is a well known form of vitamin B6 with well established utility.

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